Abstract:
The manufacture of carboxylic acids or their anhydrides by catalytic oxidation of aromatic or unsaturated aliphatic hydrocarbons in tube reactors with fixed-bed catalysts containing vanadium pentoxide, the internal surface of the tubes of the reactor being completely or partially coated with a catalytic composition containing titanium dioxide and/or zirconium dioxide.
Abstract:
A supported catalyst for the oxidation of o-xylene or naphthalene into phthalic anhydride which contains in the catalytically active material (in addition to from 1 to 40% by weight of V2O5 and from 60 to 99% by weight of anatase) from 0.01 to 0.15% by weight, based on the anatase, of sodium or potassium in the form of a compound devoid of sulfur.
Abstract translation:用于将邻二甲苯或萘氧化成邻苯二甲酸酐的负载催化剂,其含有催化活性材料(除了1至40重量%的V 2 O 5和60至99重量%的锐钛矿),0.01至0.15 基于锐钛矿的重量百分数为无硫化合物形式的钠或钾。
Abstract:
THE PRODUCTION OF A SUPPORTED CATALYST CONTAINING VANADIUM PENTOXIDE AND TITANIUM DIOXIDE FOR THE OXIDATION OF AROMATIC HYDROCARBONS TO CARBOXYLIC ACIDS OR THEIR ANHYDRIDES WITH OXYGEN OR GASES CONTAINING OXYGEN IN A FLUIDIZED BED, BY TREATING AN INERT CARRIER SUBSTANCE WITH A SOLUTION OR SUSPENSION OF A TITANIUM COMPOUND, THEN HEATING IT IN THE PRESENCE OF OXYGEN TO A TEMPERATURE OF 130* TO 1100*C., TREATING THE CARRIER THUS PRETREATED WITH A SOLUTION OR MELT OF A VANADIUM COMPOUND AND HEATING IT IN THE PRESENCE OF OXYGEN AT 350* TO 1100*C.
Abstract:
SUPPORTED CATALYSTS FOR THE OXIDATION OF AROMATIC OR UNSATURATED ALIPHATIC HYDROCARBONS TO CARBOXYLIC ACIDS OR ANHYDRIDES, CONSISTING OF AN INERT NONPOROUS CARRIER AND AN ACTIVE COMPOSITION OF 1 TO 40 PARTS BY WEIGHT OF VANADIUM PENTOXIDE AND 60 TO 90 PARTS BY WEIGHT OF TITANIUM DIOXIDE AND ALSO 0.01 TO 10% BY WEIGHT (WITH REFERENCE TO THE AMOUNT OF VANADIUM PENTOXIDE) OF A PHOSPHOROUS COMPOUND, THE VANADIUM PENTOXIDE CONTENT OF THE WHOLE SUPPORTED CATALYST BEING 0.05 TO 3% BY WEIGHT. THE CATALYSTS ARE USED ESPECIALLY FOR THE PRODUCTION OF PHTHALIC ANHYDRIDE FROM O-XYLENE.
Abstract:
SUPPORTED CATALYSTS CONTAINING VANADIUM PENTOXIDE AND TITANIUM DIOXIDE FOR OXIDATION REACTION, FOR EXAMPLE FOR THE PRODUCTION OF PHTHALIC ANHYDRIDE FROM O-XYLENE, WHICH CONTAIN ADDITIONS OF ALUMINUM OXIDE AND/OR LITHIUM OXIDE AND/OR ZIRCONIUM DIOXIDE.